Car body-bolster.



No. 706,680. Patented Allg. l2, 1902.

J. V. MGADAM.

CAR BODY BULSTER.

(Application led June 9, 1902.) (N6 Model.)

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UNITED STATES PATENT OEEICE.

JOI-IN V. MCADAM, OF ST.,LOUIS, MISSOURL-ASSIGNOR TO AMERICAN STEEL-BODY DOUBLE-BOLSTER OO., OF ST. MISSOURI, A CORPORATION or NEW JERSEY.

`CARv BODY-BOLSTER.

SPECIFICATION forming part of Letters Patent No. 706,680, dated August12, 1902.

Application led June 9, 1902. Serial No. 110,894. (No model.)

.To a/Z whom, t may concern:

Be itknown that I, J OHN V.'MGADAM, a citizen of the United States,residing at St. Louis,

in the State of Missouri, have invented anew.4 and useful Improvement inCarBody-Bolsters,`

of which the following is a specification.

My invention relates to a double body-bolster for railroad-cars.

An ordinary double body-bolster usually comprises two singlebody-bolstershavin g top and bottom plates or arch-bars', respectively,with their thimbles and connecting-bolts, a

j longitudinal truss connecting the two body-` these separate parts inasinglepiece, preferably of cast-steel, having its component members soarrangedand the metalgdistributed therethrough as to produce a compact,rigid, and durable double body-bolster specially adapted to withstandthe varying strains to which it is'subjected and at the same time insurethe maximum of strength with a minimum Weight of material.

Theinvention consists infeatures of novelty, as hereinafter describedand* claimed,

reference being had to the accompanying drawings, forming part of thisspecification, Whereon- Figure l is a' top plan of my improved doublebody-bolster for railroad-oars; Fig. 2, a side elevation thereof,showingthe sills of the car in transverse section broken away; Fig. 3, alongitudinal vertical section through the bolster on line`3 3 inrFig. 1;Fig. 4, an end view of the bolster; Fig. 5, across-section through thesame on line 5 5 in Fig. l, showing oneof the side bearings attachedthereto; and Figs; (i, 7, and 8, detail cross-sections to enlargedscale, through the bolster on lines G 6, 7 7, and 8 8, respectively, inFig. 1, like letters and numerals of reference denoting .like parts inall the figures.

ends of an intermediate cross-beam c (preferably au I-beam) and at theirend portions, respectively, tothe corresponding endsy ofan intermediatecross-beam d, (preferablya T- beam,) the top fianges 3 and 4 of themiddle beam c and end beamsd,.respectively, being iiush with the topfianges l of the side beams a, and the top flanges 4 of the end beams dadapted to bear longitudinally against the under sides of the outercar-sills l).

The top and bottomifianges 3 and 5,-respectively, ofthe middle beam c,where they unite with the top and bottom flanges 1 and 2 of the sidebeams a, are flared or spread out- Ward toward the ends of the sidebeams a,

or, in other words, the corners resulting from the junction of theflanges 3 and 5 with the flanges l and V2 are formed withgusset-fillings 3 and 5', respectively,fthe gusset-fillings 3 beingflush-at the ,topwith the anges 3 and 1 and adapted to bear against thevunder sides of the car-sills bthereat.

The inner top flanges 4 of the end beams CZ, at their junction with thetop anges l of the side beams a, are also preferably formed with.gusset-filling 4 in a similar Tmanner'to the 4gusset-fillings 3, of themiddlebeam c.

By this construction the body-bolster Als prevented from springingtransversely under longitudinal strains of the car-body, which is alsothereby strengthened and rendered more rigid under varying loads,`rounding.curves, and other sudden strains to Whichit is subjeoted.

In the vertical web 6 of the middle beam c is formed a tubularenlargement 7, through which and through the top flanges 3 is formedIOC) the central vertical hole 8 for receiving the king-bolt, (notshown,) and around the enlargement 7 and hole 8 at their lower end isformed the body center-bearing 9 for engaging the center-bearin g of thetruck-bolster in the usual Well-known manner.

On the under sides of the outer top iianges 4 of the end beams d,respectively, are formed lugs 10, to which the ends ot' the truss-rods(not shown) are coupled.

All the parts above described-to Wit, the side beams d, the middle beamc, with its gusset-fillings 3 and 5', and the center bearing 7 and 9,and the end beams d, with their gusset-fillings 4', and lugs 10 for thetruss-rodsare in one piece throughout and preferably of cast-steel, thedimensions, shape, and distribution of the metal through the entirestructure being calculated for obtaining a cured to the car-sills b b.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. A car body-bolster, consisting of two opposite side beams, and across-beam intermediate to the side beams and united thereto, the saidbeams having lateral gussets at their junctions to each other, andadapted with the said gussets to bear against the car-sills,substantially as described.

2. A car body-bolster, consisting of two opposite side beams, and across-beam intermediate to the side beams and united thereto,

` the said beams having lateral gussets at their junctions to eachother, all the said parts being integral and adapted to bear against thecar-sills, substantially as described. l

3. A car body-bolster, consisting of two 0p- -posite side beams, and across-beam intermeto the side beams and united thereto at their middleportion, or thereabout, and a crossbeam intermediate to the side beamsand united thereto at their end portions, respectively, the said beamshaving lateral gussets at their junctions to each other, and adaptedwith the said gussets to bear against the car sills, substantially asdescribed.

5. A car body-bolster, consisting of two opposite side beams, across-beam intermediate to the side beams and united thereto at theirmiddle portion, or thereabout, a cross-beam intermediate to the sidebeams and united thereto at their end portions, respectively, the saidbeams having lateral gussets at their junctions to each other, and thesaid crossbeams having respectively the body centerbearings and lugs forthe truss-rods, allthe said parts being integral, substantially as derscribed. f

In testimony whereof I have signed my 'naine to this specification inthe presence of two subscribing witnesses.

JOHN V. MCADAM.

Witnesses:

J. G. ADERToN, EDWARD W. FURRELL.

